YouTube Timestamp Generator & Chapter Fixer

YTChapterFix is a free tool that helps you create, fix, shift, and recalculate YouTube chapter timestamps.

If you edit a video after creating timestamps, add an intro, change playback speed, remove a section, or insert extra content, your old timestamps can become inaccurate. Instead of fixing every chapter manually, you can use YTChapterFix to update them in one place.

The tool can also check your timestamps for common YouTube chapter requirements before you publish them.

What Is a YouTube Timestamp Generator?

A YouTube timestamp generator helps you prepare chapter markers for a video description.

A basic chapter list may look like this:

00:00 Introduction
02:15 Chapter 1
08:42 Chapter 2
15:30 Chapter 3

When these timestamps are added correctly to a YouTube video description, viewers can jump directly to different sections of the video.

YouTube allows creators to add manual video chapters using timestamps and titles in the description. The first timestamp should begin at 00:00, the video should include at least three timestamps in ascending order, and each chapter should be at least 10 seconds long. You can confirm the current rules in the official YouTube Help documentation.

Google may also use properly formatted YouTube timestamps and labels to identify key moments in video search results. See Google’s video search documentation for details.

How to Use YTChapterFix

Using the tool is simple.

Paste Your Existing Timestamps

Paste your chapter list into the input box.

You can enter timestamps such as:

00:00 Intro
04:25 Main Topic
12:10 Examples
22:45 Conclusion

YTChapterFix reads the timestamp and chapter title from each line.

Change Playback Speed

If your audio or video duration changes because of playback speed, enter the original speed and the new speed.

For example:

Original speed: 1.00x

New speed: 0.90x

The tool recalculates each timestamp so your chapters match the slower version.

This can be useful for:

• AI voiceovers
• audiobooks
• text-to-speech videos
• podcasts
• narrated tutorials

Add or Remove an Intro Offset

If you add an intro before the original video starts, every timestamp needs to move forward.

For example, if you add a 5-second intro, enter:

+5 seconds

The tool adds five seconds to every chapter.

If you remove content from the beginning of the video, you can apply a negative offset instead.

Adjust Timestamps After a Mid-Video Edit

Sometimes only part of the video changes.

For example, imagine you insert a 30-second sponsor segment at 20:00.

You do not want to move chapters before 20:00. You only need to move the chapters that come after that point.

YTChapterFix can apply an adjustment from a specific timestamp onward, helping you correct chapter times without recalculating the entire video manually.

Validate and Copy Your Chapters

After recalculating your timestamps, run the validator.

The tool checks for common problems such as:

• missing 00:00
• too few chapters
• timestamps out of order
• chapters shorter than 10 seconds
• invalid timestamp formatting

When everything looks correct, copy the final chapter list and paste it into your YouTube description.

How YouTube Chapter Timestamps Work

YouTube chapters divide a video into separate sections.

Each chapter includes:

• a start time
• a chapter title

For example:

00:00 Introduction
03:20 Setup
10:45 Tutorial
18:15 Final Tips

When the format is valid, viewers can navigate between sections more easily.

Manual chapters also override automatic video chapters for that video.

YouTube Chapter Requirements

Before publishing your timestamps, check these important rules.

Start the First Chapter at 00:00

The first listed timestamp should start at:

00:00

If your first timestamp begins later, YouTube may not recognize the list as manual chapters.

Use at Least Three Chapters

Your video should contain at least three timestamps.

Two chapter entries are not enough for manual video chapters.

Keep Timestamps in Chronological Order

Your timestamps should move forward from the beginning of the video to the end.

Correct:

00:00
03:00
09:30
18:20

Incorrect:

00:00
09:30
03:00
18:20

YouTube requires the timestamps to be listed in ascending order.

Make Each Chapter at Least 10 Seconds Long

YouTube states that the minimum chapter length is 10 seconds.

If two timestamps are only a few seconds apart, the chapter structure may not work correctly.

How to Recalculate Timestamps After Changing Video Speed

Changing playback speed changes the total duration of the content.

For example, if a section starts at:

10:00

and you change the content from 1.00x to 0.90x, that section will start later in the slower version.

Ten minutes equals 600 seconds.

A simplified recalculation is:

600 ÷ 0.90 = 666.67 seconds

That is approximately:

11:07

If you also add a 3-second intro, the new timestamp becomes approximately:

11:10

YTChapterFix performs this calculation automatically for every chapter.

How to Shift All YouTube Timestamps Forward or Backward

A timestamp offset is useful when the entire video moves by the same amount.

Common examples include:

• adding a 5-second logo animation
• removing a 10-second intro
• adding music before the original start
• trimming the beginning of the video

If you add 8 seconds, every timestamp moves forward by 8 seconds.

If you remove 6 seconds, every timestamp moves backward by 6 seconds.

This is much faster than editing each chapter individually.

How to Fix Timestamps After Adding or Removing Video Sections

Editing the middle of a video is different from changing the beginning.

Suppose you have:

00:00 Intro
10:00 Part One
20:00 Part Two
30:00 Part Three

Now you insert a 40-second section at 15:00.

The 00:00 and 10:00 chapters stay the same.

The later chapters need to move forward:

20:40 Part Two
30:40 Part Three

A mid-video adjustment feature is useful for this type of edit because it changes only timestamps after the edit point.

Why YouTube Chapters May Not Be Working

If your chapters are not appearing, check the basics first.

Common problems include:

• the first timestamp does not start at 00:00
• fewer than three timestamps are listed
• chapters are not in ascending order
• one or more chapters are shorter than 10 seconds
• timestamps or titles are formatted incorrectly

YouTube also notes that access to chapters may depend on advanced features being available on the channel.

Common Uses for YTChapterFix

Audiobooks and AI Voiceovers

Audiobook creators often change narration speed after the script is recorded.

A small speed change can make every chapter timestamp inaccurate.

YTChapterFix can recalculate the entire chapter list automatically.

Podcasts and Interviews

Long podcasts may have many sections.

If an introduction, advertisement, or deleted segment changes the final edit, the chapter list can be shifted without rewriting everything manually.

Tutorials and Online Courses

Tutorial creators can use chapters to separate lessons, steps, examples, and explanations.

If the final video is trimmed or extended, the chapter times can be corrected quickly.

Long-Form YouTube Videos

Any long video with multiple sections can benefit from clear chapter timestamps.

They help viewers move directly to the part they need.

Frequently Asked Questions

How do I create YouTube timestamps?

Create a list where each line contains a timestamp followed by a chapter title.

Example:

00:00 Introduction
02:30 Setup
07:45 Main Tutorial

Then add the list to your YouTube video description.

Why are my YouTube chapters not working?

Check that your first timestamp is 00:00, you have at least three timestamps, they are in ascending order, and every chapter is at least 10 seconds long.

How do I change all timestamps after adding an intro?

Use a positive offset equal to the intro duration.

For a 7-second intro, add +7 seconds to all timestamps.

How do I recalculate timestamps after changing playback speed?

Enter the original speed and the new speed into YTChapterFix. The tool recalculates each timestamp based on the new duration.

Can I use HH:MM:SS timestamps?

Yes. For longer videos, timestamp formats that include hours are commonly used.

Does YTChapterFix upload my timestamp data?

The main timestamp calculations are designed to run in your browser. Your timestamp list does not need to be sent to a server just to perform the calculation.